Will the Android device still run at the next startup if once happens a database locked

my friends: I am working on a Android App.In a cloud test, I found that some devices happened an error——"database is locked".Considering that i have not met the error,so i wonder that once the error happens on a device, will the device run nomally at the next startup.My worry is the database will be locked forever if the application won't clear cache or uninstalls. Thinks for your attention.

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E...It seems that few guys come with this issue.Luckily it reappeared on my device finally.Then i can answer it myself.The answer is TRUE,Once happened,it will appear at the next launch, which is very horrible for users.I am working hard to fix it.

Use alarmmanager to schedual a call to a method which fetch no. from your database and send your desired message to that number. From android docs: AlarmManager:This class provides access to the system alarm services. These allow you to schedule your application to be run at some point in the...

You have an extra ) at the end of your query string. Remove it. Also remove the GROUP BY valMonth if you want to get all records for a given month and not just one aggregate record. If you query by month extensively, consider storing the month value directly in...

WITH clause support was added in SQLite 3.8.3. API levels below 20 are using an older version of SQLite. Refactor your query that you get the results you want with the SQL supported on all targeted API levels....

String literals in SQL are denoted by single quotes ('). Without them, and string would be treated as an object name. Here, you generate a where clause title = Test. Both are interpreted as columns names, and the query fails since there's no column Test. To solve this, you could...

I have found solution of my problem . As suggested by @pskink in his comment above , i used ViewBinder . I created a ViewBinder like this . public class MyViewBinder implements ViewBinder{ @Override public boolean setViewValue(View view, Cursor cursor, int columnIndex) { int viewID = view.getId(); switch(viewID){ case R.id.tvFriendName...

You have several problems in your code. First of all, you are calling cursor.moveToFirst() twice innecesarily: if (cursor != null && cursor.moveToFirst()) // <-- First call cursor.moveToFirst(); // <-- Second call Also, you are trying to get data from the cursor even if the cursor is null or it has...

Variables get bound with a single literal value. If you have many values, you need a separate ? placeholder for each. Example: cursor = readableDb.rawQuery("SELECT * FROM User where objectId NOT IN (?,?,?)", new String[] { "1", "2", "3" }); ...

MATCH '*foo*' queries never worked correctly in any version of sqlite. The fact that you got some results earlier was just a coincidence. Just the prefix form MATCH 'foo*' (and MATCH 'foo') are supported. Lollipop ships with a newer version of sqlite. For detailed list of changes between sqlite versions,...

One way is String query="SELECT * from "+TABLE_Birthday +" WHERE "+ KEY_Event_Date +" >= date('now','localtime', '-30 day')"; Cursor c = myDataBase.rawQuery(query,null); It will fetch last 30 days records from today. but your KEY_Event_Date must have values in yyyy-MM-dd then only it works....

LIMIT 20,2 and I thought it supposed to skip 20 * 2 rows and then starts taking rows from there, which either my thought or my query is wrong. LIMIT 20,2 skips first 20 rows and returns at most 2 remaining rows. It's the same as LIMIT 2 OFFSET...

you should copy the .db file from your assets folder to an internal/external storage. You can use following codes, private static String DB_PATH = "/data/data/your package/database/"; private static String DB_NAME ="final.db";// Database name To create a database, public void createDataBase() throws IOException { //If database not exists copy it from...

This is the solution that I produced based on Seth's answer. SELECT DISTINCT (foreign_id), value, id FROM testTable WHERE value = 2 UNION SELECT DISTINCT (foreign_id), value, id FROM testTable WHERE value = 1 AND foreign_id NOT IN ( SELECT foreign_id FROM testTable WHERE value = 2 ) ...

Looks like onCreateis not called before you run getfriendsdata();. Because Db1 is only initialized if in onCreate(). You have to call Cursor c= getReadableDatabase().rawQuery("SELECT * FROM friendinfotable",null);...

From documentation: A table created using CREATE TABLE AS has no PRIMARY KEY and no constraints of any kind. The default value of each column is NULL. You don't have to add UNIQUE constraint on a COLUMN that has PRIMARY KEY constraint. Explanation: A UNIQUE constraint is similar to a...

Is the query() method provided by SQLiteDatabase class safe to use without worrying about SQL injections? No. query() is essentially just a wrapper for SQLiteQueryBuilder and it constructs a raw SQL statement that gets executed as is. Or is the following the only safe way to go? Not strictly...

Your table name contains spaces... so you should enclose it in square brackets, like this [Answers and Hints]. Or, better, use underscores, like this Answers_and_Hints Otherwise, the SQLite DDL (Data Definition Language) would interpret the different words as different commands....

You can log the path returned by Context.getDatabasePath(String name) to see where the DB file should be. However, as mentioned by others, your device may not give you access to that path unless you have root access.

Assuming I understand your question, it seems simple enough. To get a subset just use a between...and operator on the sequence column: SELECT stop_from, stop_to FROM routes WHERE sequence BETWEEN 2 AND 11 ORDER BY sequence To get the subset in the opposite direction, just order by desc, and select...

You have a misplaced new: sqLiteDatabase = new userDBHelper.getReadableDatabase(); Remove it - you want to call the getReadableDatabase() method on the userDBHelper object, not create a new instance of userDBHelper.getReadableDatabase class that doesn't exist....

So ... You have a NullPointerException at the line return cursor.getCount(); This simply means, that cursor is null. Where does cursor come from? Where is it set? The only place I see is the constructor: public class FriendsListCursorAdapter extends CursorAdapter { private Cursor cursor; ... public FriendsListCursorAdapter(Context context, Cursor c,...

Use DISTINCT for the selection. For more info: http://www.tutorialspoint.com/sqlite/sqlite_distinct_keyword.htm EDIT: Maybe you can select with distinct from the current result. Something like this: SELECT DISTINCT albumTable.album FROM (SELECT albumTable.album, artistTable.artist, songTable.filepath from albumTable inner join artistTable on albumTable.artistID = artistTable.artistID inner join songTable on albumTable.albumID = songTable.albumID ) I don't...

Answered http://stackoverflow.com/a/30710226/437039 by laalto MATCH '*foo*' queries never worked correctly in any version of sqlite. The fact that you got some results earlier was just a coincidence. Just the prefix form MATCH 'foo*' (and MATCH 'foo') are supported. Lollipop ships with a newer version of sqlite. For detailed list of...

You can use std::to_string to build a string using your variables #include <string> std::string sql = " INSERT OR REPLACE INTO " + std::to_string(TypeContract.CTablePhotoMatch.TABLE_NAME) + "(" + ...; If any of your variables are already std::string, then you don't need to use this function you can simply use + to...

It looks like you accidentally created a context local variable instead of using the instance variable. So, context is null when you pass it into MyDBHandler, so when you call this.getWritableDatabase(), this is null. As a result, you get the NullPointerException, as you can see in the log: Caused by:...

Instead of using String selection = ContactsContract.Contacts.HAS_PHONE_NUMBER + " display_name like %"+constraint.toString()+"%"; use String selection = ContactsContract.Contacts.HAS_PHONE_NUMBER + " and display_name like '%"+constraint.toString()+"%'"; this may solve the problem...

Okay I finally got it working and It was actually quite simple... //.... if (numberofbits > 50) { db = new DatabaseHandler(getActivity()); db.updateImages(new Images(dbid, "Downloaded", imagename_)); //This is what I added: List<Images> listdb = db.getImages(); mAdapter = new ImgAdapter(getActivity(), listdb); recyclerView.setAdapter(mAdapter); db.close(); //populateList(); -> THIS I USED FOR A LISTVIEW...

My guess is that in your database definition, you didn't specify the ID column as INTEGER NOT NULL. So when you select every row, one or more of those rows has a null ID, which you're trying to parse as an int here: assignment.setID(Integer.parseInt(cursor.getString(0))); Change your database definition to require...

You should look into the insertOrThrow() method which will throw an SQLiteConstraintException if this occurs. Then, you can put your insert into a try/catch block: try{ db.insertOrThrow(table, columnHack, values); } catch (SQLiteConstraintException e){ Toast.makeText(context, "Unable to insert values.", Toast.LENGTH_SHORT).show(); } ...

The answer to this question depends on where the database is located (regardless of whether you're using SQLite or MySQL to access the database). If you're storing the database on the Android device, then that database is specific to that device. If the database however is stored on some internet-facing...

Simply return your address as String and store it in your local db using SQlite. It is easy to store a string in SQLite. Below is the code to get address. public static String getAddressFromLocation(Context context, double latitude, double longitude) { String address = ""; Geocoder geocoder; List<Address> listAddresses; try...

Yes you can. You need to connect your app to a webservice from where retrieve the info, and then the app logic must update the database. One implementation could be: every time your app starts, it asks to the webservice "hey, do i need to update my database?" and then...

You should avoid using the same adapter for two different stream, as it will have to deal concurrent issue, that you can avoid using RxJava. Why not try to merge your streams into a single one, and, then, use only one adapter ? TrackerDbUtils.getListSubmissionObservable(db) .map(Submission.MAP) .mergeWith(TrackerDbUtils.getSummaryObservable(db) .map(Summary.MAP)) .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(mAdapter);...

The documentation says: Triggers may be created on views, as well as ordinary tables, by specifying INSTEAD OF in the CREATE TRIGGER statement. This is rather misleading. What this sentence is actually trying to say is that on normal tables, you can use only BEFORE and AFTER triggers, but on...